An issue was discovered on Renesas RX65 and RX65N devices.
Priority LOW 21Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
An issue was discovered on Renesas RX65 and RX65N devices. With a VCC glitch, an attacker can extract the security ID key from the device. Then, the protected firmware can be extracted.
Why it matters now
EPSS 0.0034 27th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:renesas:rx65n_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Renesas |
| cpe:2.3:h:renesas:rx65n:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Renesas |
| cpe:2.3:o:renesas:rx65_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Renesas |
| cpe:2.3:h:renesas:rx65:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Renesas |
- cpe:2.3:o:renesas:rx65n_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Renesas
- cpe:2.3:h:renesas:rx65n:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Renesas
- cpe:2.3:o:renesas:rx65_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Renesas
- cpe:2.3:h:renesas:rx65:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Renesas
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-43327
- 2026-10-03 Alias added: GHSA-g528-27f5-rgqv
References
Sources
- CVE-2021-43327 · CVE Program
- CVE-2021-43327 · NVD
- FIRST EPSS
- GHSA-g528-27f5-rgqv · GitHub Advisory Database · CC BY 4.0
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